<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示框 -->
      <el-alert title="添加商品信息" type="info" center show-icon> </el-alert>

      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>


      <!-- 验证表单必须在外面 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
      <!-- 侧边栏Tabs -->
        <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLevea" @tab-click="tabClick">
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input v-model="addForm.goods_price" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
                <el-input v-model="addForm.goods_number" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input v-model="addForm.goods_weight" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                <!-- 级联选择器 -->
                <el-cascader
                    v-model="addForm.goods_cat"
                    :options="cateList"
                    :props="cateProps"
                    @change="handleChange">
                </el-cascader>
              </el-form-item>
            </el-tab-pane>

            <!-- 渲染表单的item项 -->
            <el-tab-pane label="商品参数" name="1">
              <el-form-item :label="item.attr_name" v-for="item in manyTabsData" :key="item.attr_id">
                <!-- 复选框 -->
                <el-checkbox-group v-model="item.attr_vals">
                    <el-checkbox border :label="items" v-for="(items,index) in item.attr_vals" :key="index"></el-checkbox>
                </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>

            <el-tab-pane label="商品属性" name="2">
              <el-form-item :label="item.attr_name" v-for="item in onlyTabsData" :key="item.attr_id">
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>

            <el-tab-pane label="商品图片" name="3">
              <el-upload
                :action="upload"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                list-type="picture"
                :headers="headerObj"
                :on-success="handleSuccess"
                >
                <el-button size="small" type="primary">点击上传</el-button>
                <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
              <!-- 副本完编辑器 -->
              <quill-editor  v-model="addForm.goods_introduce">

              </quill-editor>


              <el-button type="primary" @click="addGoods">添加商品</el-button>
            </el-tab-pane>

        </el-tabs>
      </el-form>
    </el-card>


    <!-- 图片预览对话框 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="50%"
      >
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>



  </div>
</template>

<script>
  import _ from "lodash" //导入深拷贝

  export default {
    created(){
      this.getCateList()
    },
    data(){
      return{
        //步骤条
        activeIndex:"0",
        //表单
        addForm:{
          goods_name:'',
          goods_price:0,
          goods_number:0,
          goods_weight:0,
          //商品所属的分类数组
          goods_cat:[],
          //上传图片
          pics:[],
          //商品详情描述
          goods_introduce:'',
          //商品的参数（数组），包含 `动态参数` 和 `静态属性`
          attrs:[]

        },
        //表单验证规则
        addFormRules:{
          goods_name:[{ required: true, message: '请输入商品名称', trigger: 'blur' }],
          goods_price:[{ required: true, message: '请输入商品价格', trigger: 'blur' }],
          goods_number:[{ required: true, message: '请输入商品数量', trigger: 'blur' }],
          goods_weight:[{ required: true, message: '请输入商品重量', trigger: 'blur' }],
          goods_cat:[{ required: true, message: '请选择商品分类'}]
        },
        //商品分类数据
        cateList:[],
        //级联选择器
        cateProps:{
          expandTrigger: 'hover',
          label:'cat_name',
          value:'cat_id',
          children:'children'
        },
        //添加商品的数据列表
        manyTabsData:[],
        onlyTabsData:[],
        //上传图片的地址
        upload:'http://127.0.0.1:8888/api/private/v1/upload',
        //手动设置请求头
        headerObj:{
          Authorization : window.sessionStorage.getItem('token')
        },
        //预览图片路径
        previewPath:'',
        previewDialogVisible:false
      }
    },
    methods:{
      //获取所有商品分类数据
      async getCateList(){
        const {data : res } = await this.$http.get("categories")
        if(res.meta.status !== 200) return this.$message.error(res.meta.msg)

        this.cateList = res.data
        // console.log(this.cateList);
      },
      //改变时触发
      handleChange(){
        // console.log(this.addForm.goods_cat);
        if(this.addForm.goods_cat.length !== 3){
          this.addForm.goods_cat = []
        }
      },
      //如果tabs离开，进入触发的函数
      beforeTabLevea(activename,oldtivename){
        if(oldtivename === '0' && this.addForm.goods_cat.length !== 3){
          this.$message.error('请选择商品分类')
          return false
        }
      },
      //点击事件，拿到对应的name
      async tabClick(){
        // console.log(this.activeIndex);
        //访问动态参数面板
        if(this.activeIndex === '1'){
          const {data :res } = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
          if(res.meta.status !== 200) return this.$message.error(res.meta.msg)

          //处理 字符串 变成 数组
          res.data.forEach(item => {
            item.attr_vals = item.attr_vals.length ===0 ? [] : item.attr_vals.split(' ')

          })

          this.manyTabsData = res.data
          // console.log(this.manyTabsData);
        }

        if(this.activeIndex === '2'){
          const {data :res } = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
          if(res.meta.status !== 200) return this.$message.error(res.meta.msg)

          // console.log(res.data);
          this.onlyTabsData = res.data
          // console.log(this.onlyTabsData);
        }

      },
      //预览图片触发的事件
      handlePreview(file){
        this.previewPath = file.response.data.url
        this.previewDialogVisible = true
      },
      //点击X号触发的事件
      handleRemove(file){
        //获取将要删除的临时路径
        const filePath = file.response.data.tmp_path

        const index = this.addForm.pics.findIndex(item => item.pic === filePath)
        this.addForm.pics.splice(index,1)
      },
      //监听图片上去事件成功
      handleSuccess(response){
        // console.log(response);
        //拼接得到对象信息
        const picInfo = {pic : response.data.tmp_path }
        //储存信息
        this.addForm.pics.push(picInfo)
        // console.log(this.addForm);
      },
      //添加商品
      addGoods(){
        this.$refs.addFormRef.validate(async vaild => {
          //预验证不通过
          if(!vaild) return this.$message.error('请填入必要的表单项')

          //通过,处理数据
          //做一层深拷贝
          const deepAddFrom = _.cloneDeep(this.addForm)
          deepAddFrom.goods_cat = deepAddFrom.goods_cat.join(',')
          // console.log(deepAddFrom)

          //处理动态参数
          this.manyTabsData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals.join(' ')
            }
            this.addForm.attrs.push(newInfo)
          })

          //处理静态属性
          this.onlyTabsData.forEach(item => {
            const newInfo ={
              attr_id: item.attr_id,
              attr_value: item.attr_vals
            }
            this.addForm.attrs.push(newInfo)
          })

          //深拷贝需要赋值  我们处理的对象是deepAddFrom
          deepAddFrom.attrs = this.addForm.attrs

          //发起请求
          const { data:res } =  await this.$http.post('goods', deepAddFrom)

          if(res.meta.status !== 201) return this.$message.error(res.meta.msg)

          this.$message.success(res.meta.msg)
          this.$router.push('/goods')
        })
      }
    },
    computed:{
      cateId(){
        if(this.addForm.goods_cat.length === 3 ) return this.addForm.goods_cat[2]
        return null
      }
    }
  }
</script>

<style lang="less" scoped>

.el-steps{
  margin: 35px 0px;
}

.el-checkbox{
  margin: 0 10px 0px 0px !important;
}

.previewImg{
  width: 100%;
}
.el-button{
  margin-top: 20px;
}
</style>
